By MarketWatch Automation
Shares of Boeing and Walgreens Boots are trading lower Thursday morning, propelling the Dow Jones Industrial Average selloff. Shares of Boeing /zigman2/quotes/208579720/composite BA +1.67% and Walgreens Boots /zigman2/quotes/203410933/composite WBA -0.02% have contributed to the index's intraday decline, as the Dow /zigman2/quotes/210598065/realtime DJIA +0.43% was most recently trading 479 points lower (-1.6%). Boeing's shares have declined $5.32, or 4.0%, while those of Walgreens Boots have fallen $1.23 (3.7%), combining for an approximately 43-point drag on the Dow. Other components contributing significantly to the decline include Apple Inc. /zigman2/quotes/202934861/composite AAPL +0.99% , Intel /zigman2/quotes/203649727/composite INTC +0.21% , and American Express /zigman2/quotes/203805826/composite AXP -0.63% . A $1 move in any of the index's 30 components results in a 6.59-point swing.